Issue of NAT for VPN
If I have a LAN or 10.1.1.0/24 and I want NAT all of the hosts in 192.168.1.0/24. I really don't want to create the object for each unique host network, because it's just for a lot. I just wanted to confirm by creating two objects then natting them must configure a NAT right one?
network object obj - 10.1.1.0
10.1.1.0 subnet 255.255.255.0
!
network object obj - 192.168.1.0
subnet 192.168.1.0 255.255.255.0
!
NAT (inside, outside) source static obj - 10.1.1.0 obj - 192.168.1.0 statick "remotely" destination "at a distance".
Now when the remote network need access to network 10.1.1.0/24 hosts they should just be able to access to?
10.1.1.1 will map to 192.168.1.1
10.1.1.2 will map to 192.168.1.2
10.1.1.3 will map to 192.168.1.3
and so on...?
In addition,
A test on my ASA home
Configuration
the object of the LAN network
10.0.0.0 subnet 255.255.255.0
network of the REMOTE object
subnet 10.0.1.0 255.255.255.0
network of the LAN - NAT object
10.0.100.0 subnet 255.255.255.0
LAN LAN destination - static NAT NAT (LAN, WAN) static source REMOTE
LAN remotely
ASA (config) # packet - trace tcp 10.0.0.10 LAN entry 1025 10.0.1.1 80
Phase: 3
Type: NAT
Subtype:
Result: ALLOW
Config:
LAN LAN destination - static NAT NAT (LAN, WAN) static source REMOTE
Additional information:
Definition of static 10.0.0.10/1025 to 10.0.100.10/1025
REMOTE CONTROL FOR LAN
ASA (config) # packet - trace entry WAN tcp 10.0.1.100 1025 10.0.100.10 80
Phase: 1
Type: UN - NAT
Subtype: static
Result: ALLOW
Config:
LAN LAN destination - static NAT NAT (LAN, WAN) static source REMOTE
Additional information:
NAT divert on the LAN of the output interface
Untranslate 10.0.100.10/80 to 10.0.0.10/80
-Jouni
Tags: Cisco Security
Similar Questions
-
Making the NAT for VPN through L2L tunnel clients
Hi.I has the following situation in my network. We need for users who log on our site with the VPN clients to connect to another site via a tunnel L2L. The problem is that I need NAT addresses from the pool of VPN client in another beach before going on the L2L tunnel because on the other side, we have duplication of networks.
I tried to do NAT with little success as follows:
ACL for pool NAT of VPN:
Extended list ip 192.168.253.0 access TEST allow 255.255.255.0 192.168.0.0 255.255.255.0
Extended list ip 192.168.253.0 access TEST allow 255.255.255.0 192.168.5.0 255.255.255.0
NAT:
Global 172.20.105.1 - 172.20.105.254 15 (outdoor)
NAT (inside) 15 TEST access-list
CRYPTO ACL:
allowed ro access list extended LAN ip 255.255.0.0 192.168.0.0 255.255.255.0
allowed ro access list extended LAN ip 255.255.0.0 192.168.5.0 255.255.255.0
IP 172.20.105.0 RO allow extended access list 255.255.255.0 192.168.0.0 255.255.255.0
IP 172.20.105.0 RO allow extended access list 255.255.255.0 192.168.5.0 255.255.255.0
permit same-security-traffic intra-interface
Am I missing something here? Something like this is possible at all?
Thanks in advance for any help.
We use the ASA 5510 with software version 8.0 (3) 6.
You need nat to the outside, not the inside.
NAT (outside) 15 TEST access-list
-
Summary:
We strive to establish a two-way VPN L2L tunnel with a partner. VPN traffic is one-to-many towards our partner, and our partner they need of a many-to-one to us (they need to access a host on our network). In addition, our partner has many VPN, so they force us to use a separate NAT with two private hosts addresses, one for each direction of the tunnel.
My initial configuration of the tunnel on my grown up side of Phase 1, but not IPSec. Partner ran debug that revealed that my host did not address NAT'd in the NAT policy. We use an ASA5520, ver 7.0.
Here is the config:
# #List of OUR guests
the OURHosts object-group network
network-host 192.168.x.y object
# Hosts PARTNER #List
the PARTNERHosts object-group network
network-host 10.2.a.b object
###ACL for NAT
# Many - to - many outgoing
access-list extended NAT2 allowed ip object-group OURHosts-group of objects PARTNERHosts
# One - to - many incoming
VIH3 list extended access permit ip host 192.168.c.d PARTNERHosts object-group
# #NAT
NAT (INSIDE) 2-list of access NAT2
NAT (OUTSIDE) 2 172.20.n.0
NAT (INSIDE) 3 access-list VIH3
NAT (OUTSIDE) 3 172.20.n.1
# #ACL for VPN
access list permits extended VPN ip object-group objects PARTNERHosts OURHosts-group
access allowed extended VPN ip host 192.168.c.d PARTNERHosts object-group list
# #Tunnel
tunnel-group
type ipsec-l2l card
<#>crypto is the VPN address card crypto
<#>the value transform-set VPN #>card
<#>crypto defined peer #> #>I realize that the ACL for the VPN should read:
access allowed extended VPN ip host 172.20.n.0 PARTNERHosts object-group list
access allowed extended VPN ip host 172.20.n.1 PARTNERHosts object-group list
.. . If the NAT was working properly, but when this ACL is used, Phase 1 is not even negotiating, so I know the NAT is never translated.
What am I missing to NAT guests for 172.20 addresses host trying to access their internal addresses via the VPN?
Thanks in advance.
Patrick
Here is the order of operations for NAT on the firewall:
1 nat 0-list of access (free from nat)
2. match the existing xlates
3. match the static controls
a. static NAT with no access list
b. static PAT with no access list
4. match orders nat
a. nat [id] access-list (first match)
b. nat [id] [address] [mask] (best match)
i. If the ID is 0, create an xlate identity
II. use global pool for dynamic NAT
III. use global dynamic pool for PAT
If you can try
(1) a static NAT with an access list that will have priority on instruction of dynamic NAT
(2) as you can see on 4A it uses first match with NAT and access list so theoretically Exchange autour should do the trick.
I don't see any negative consequences? -Well Yes, you could lose all connectivity. I don't think that will happen, but I can't promise if you do absolutely not this after-hours.
Jon
-
Rule of NAT for vpn access... ?
Hey, putting in place the vpn ssl via the client Anyconnect on a new ASA 5510, ASA ASDM 6.4.5 8.4.2.
I am able to 'connect' through the anyconnect client, & I am assigned an ip address from the pool of vpn that I created, but I can't ping or you connect to internal servers.
I think that I have configured the split tunneling ok following the guide below, I can browse the web nice & quickly while connected to the vpn but just can't find anything whatsoever on the internal network.
http://www.Cisco.com/en/us/products/ps6120/products_configuration_example09186a0080975e83.shtml
I suspect her stockings for a nat rule, but I am a bit stuck if it should be a rule of nat object network or if it must be dynamic/static & if its between the external interface or external ip & network inside or the VPN (I created the pool on a different subnet), or a 'Beach' (but then I am getting overlapping ip errors when I try to create a rule for a range of IP addresses.
Any advice appreciated,
Hi Eunson,
After have connected you to the ASA that clients receive an IP address, let's say 192.168.10.0/24 pool, the network behind the ASA is 192.168.20.0/24.
On the SAA, you would need an NAT exemption for 192.168.20.0 to 192.168.10.0
Create two groups of objects, for pool VPN and your itnernal LAN.
object-group network object - 192.168.20.0
object-network 192.168.20.0 255.255.255.0
object-group network object - 192.168.10.0
object-network 192.168.10.0 255.255.255.0
NAT (inside, outside) 1 source static object - 192.168.20.0 object - 192.168.20.0 destination static object - 192.168.10.0 object - 192.168.10.0 non-proxy-arp-search to itinerary
At the inside = interface behind which is your LOCAL lan
Outside = the interface on which the Clients connect.
If you can't still access then you can take the shot on the inside interface,
create and acl
access-list allowed test123 ip host x.x.x.x y.y.y.y host
access-list allowed test123 ip host host x.x.x.x y.y.y.y
interface test123 captures inside test123 access list
view Cape test123
It will show if the packages are extinguished inside the interface and if we see that the answers or not. If we have all the answers, this means that there might be a routing on the internal LAN problem as devices know may not be not to carry the traffic of 192.168.10.0 return to the ASA inside the interface.
Or maybe it's that there is a firewall drop packets on your internal LAN.
HTH
-
I have a client with an ASA 5505 who has several networks, he tries to communicate via a VPN tunnel with a desktop remotely. One of the networks does not work because it is also used on the other side of the tunnel management interface, and none of both sides seem ready to re - IP their interior space.
Their proposed solution is to NAT the contradictory network on this side to a different subnet firewall before passing through the tunnel. How to implement a NAT which only uses the VPN tunnel while the rest of the traffic that comes through this device of the United-NATted Nations?
The network in question is 192.168.0.0/24. Their target you want the NAT is 172.16.0.0/24. Config of the SAA is attached.
Hello
Basically, the political dynamic configuration PAT should work to connect VPN L2L because the PAT political dynamics is processed before PAT/NAT dynamic configurations.
Only NAT configurations that can replace this dynamic NAT of the policy are
- NAT0 / exempt NAT configuration
- Strategy static NAT/PAT
- Public static NAT/PAT
And because we have determined that the only problem is with the network 192.168.0.0/24 and since there is no static configuration NAT/PAT or static policy NAT/PAT, then PAT political dynamics should be applied. Unless some configurations NAT0 continues to cause problems.
The best way to determine what rules are hit for specific traffic is to use the command "packet - trace" on the SAA
Packet-trace entry inside tcp 192.168.0.100 12345 10.1.7.100 80
For example to simulate an HTTP connection at random on the remote site
This should tell us for example
- Where the package would be sent
- He would pass the ACL interface
- What NAT would be applied
- It would correspond to any configuration VPN L2L
- and many others
Then can you take a sample output from the command mentioned twice and copy/paste the second result here. I ask get exit twice because that where the actual VPN L2L negotiations would go through the first time that this command would only raise the L2L VPN while the second command could show already all the info of what actually passed to the package simulated.
In addition, judging by the NAT format you chose (political dynamics PAT), I assume that only your site connects to the remote site? Given that the political dynamics PAT (or dynamic PAT) normal does not allow creating a two-way connection. Connections can be opened that from your site to the remote site (naturally return traffic through automatically because existing connections and translations)
-Jouni
-
Disable the NAT for VPN site-to-site
Hello world
I work in a company, and we had to make a VPN site-to site.
Everything works fine, except that the packages sent to my site are translated, in other words: the firewall on the other site (site_B) see only the IP address of my firewall (Site_A).
I tried to solve the problem, but without success, I think that natives of VPN packets is the problem.
Here is my current config running:
ASA Version 8.3(2)
!
hostname ciscoasa
enable password 9U./y4ITpJEJ8f.V encrypted
passwd 2KFQnbNIdI.2KYOU encrypted
names
!
interface Vlan1
nameif inside
security-level 100
ip address 192.168.67.254 255.255.255.0
!
interface Vlan2
nameif outside
security-level 0
ip address 41.220.X.Y 255.255.255.252 (External WAN public IP Address)
!
interface Ethernet0/0
switchport access vlan 2
!
interface Ethernet0/1
!
interface Ethernet0/2
!
interface Ethernet0/3
!
interface Ethernet0/4
!
interface Ethernet0/5
!
interface Ethernet0/6
!
interface Ethernet0/7
!
ftp mode passive
clock timezone CET 1
object network obj_any
subnet 0.0.0.0 0.0.0.0
object network 41.220.X1.Y1
host 41.220.X1.Y1
object network NETWORK_OBJ_192.168.67.0_24
subnet 192.168.67.0 255.255.255.0
object network NETWORK_OBJ_172.19.32.0_19
subnet 172.19.32.0 255.255.224.0
object network 194.2.176.18
host 194.2.XX.YY (External IP address public of the other site (Site_B))
description 194.2.XX.YY
access-list inside_access_in extended permit ip any any log warnings
access-list inside_access_in extended permit ip object NETWORK_OBJ_172.19.32.0_19 object NETWORK_OBJ_192.168.67.0_24 log debugging
access-list inside_access_in extended permit ip object 194.2.176.18 any log debugging
access-list inside_access_in extended permit ip any object NETWORK_OBJ_172.19.32.0_19 log debugging
access-list outside_1_cryptomap extended permit ip 192.168.67.0 255.255.255.0 172.19.32.0 255.255.224.0 log debugging
access-list outside_1_cryptomap extended permit ip any object NETWORK_OBJ_172.19.32.0_19 log debugging
access-list 1111 standard permit 172.19.32.0 255.255.224.0
access-list 1111 standard permit 192.168.67.0 255.255.255.0
access-list outside_1_cryptomap_1 extended permit ip 172.19.32.0 255.255.224.0 any log debugging
access-list outside_1_cryptomap_1 extended permit ip any object NETWORK_OBJ_172.19.32.0_19 log debugging
access-list outside_1_cryptomap_2 extended permit ip 192.168.67.0 255.255.255.0 172.19.32.0 255.255.224.0 log debugging
access-list outside_1_cryptomap_2 extended permit ip any object NETWORK_OBJ_172.19.32.0_19 log debugging
access-list outside_access_in extended permit ip any any log warnings
access-list outside_access_in extended permit ip object 194.2.XX.YY any log debugging
access-list outside_access_in extended permit ip any object NETWORK_OBJ_172.19.32.0_19 log debugging
access-list nonat extended permit ip 192.168.67.0 255.255.255.0 176.19.32.0 255.255.224.0
access-list nonat extended permit ip 192.168.67.0 255.255.255.0 172.19.32.0 255.255.224.0
pager lines 24
logging enable
logging monitor informational
logging asdm warnings
mtu inside 1500
mtu outside 1500
icmp unreachable rate-limit 1 burst-size 1
icmp permit any inside
icmp permit any outside
no asdm history enable
arp timeout 14400
nat (inside,outside) source dynamic any interface
nat (inside,outside) source static NETWORK_OBJ_192.168.67.0_24 NETWORK_OBJ_192.168.67.0_24 destination static NETWORK_OBJ_172.19.32.0_19 NETWORK_OBJ_172.19.32.0_19
access-group inside_access_in in interface inside
access-group outside_access_in in interface outside
route outside 0.0.0.0 0.0.0.0 41.220.X.Y 1
timeout xlate 3:00:00
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 icmp 0:00:02
timeout sunrpc 0:10:00 h323 0:05:00 h225 1:00:00 mgcp 0:05:00 mgcp-pat 0:05:00
timeout sip 0:30:00 sip_media 0:02:00 sip-invite 0:03:00 sip-disconnect 0:02:00
timeout sip-provisional-media 0:02:00 uauth 0:05:00 absolute
timeout tcp-proxy-reassembly 0:01:00
dynamic-access-policy-record DfltAccessPolicy
aaa authentication ssh console LOCAL
aaa authentication telnet console LOCAL
http server enable
http 192.168.67.0 255.255.255.0 inside
http 0.0.0.0 0.0.0.0 outside
no snmp-server location
no snmp-server contact
snmp-server enable traps snmp authentication linkup linkdown coldstart
crypto ipsec transform-set ESP-DES-MD5 esp-des esp-md5-hmac
crypto ipsec transform-set ESP-DES-SHA esp-des esp-sha-hmac
crypto ipsec security-association lifetime seconds 28800
crypto ipsec security-association lifetime kilobytes 4608000
crypto dynamic-map SYSTEM_DEFAULT_CRYPTO_MAP 65535 set transform-set ESP-DES-MD5
crypto map outside_map 1 match address outside_1_cryptomap_2
crypto map outside_map 1 set peer 194.2.XX.YY
crypto map outside_map 1 set transform-set ESP-DES-MD5
crypto map outside_map 65535 ipsec-isakmp dynamic SYSTEM_DEFAULT_CRYPTO_MAP
crypto map outside_map interface outside
crypto map inside_map 65535 ipsec-isakmp dynamic SYSTEM_DEFAULT_CRYPTO_MAP
crypto map inside_map interface inside
crypto isakmp enable inside
crypto isakmp enable outside
crypto isakmp policy 10
authentication pre-share
encryption des
hash md5
group 2
lifetime 86400
telnet 192.168.67.200 255.255.255.255 inside
telnet timeout 5
ssh 0.0.0.0 0.0.0.0 outside
ssh timeout 30
console timeout 0
dhcpd auto_config outside
!
threat-detection basic-threat
threat-detection statistics access-list
no threat-detection statistics tcp-intercept
webvpn
username bel_md password HSiYQZRzgeT8u.ml encrypted privilege 15
username nebia_said password qQ6OoFJ5IJa6sgLi encrypted privilege 15
tunnel-group 194.2.XX.YY type ipsec-l2l
tunnel-group 194.2.XX.YY ipsec-attributes
pre-shared-key *****
!
class-map inspection_default
match default-inspection-traffic
!
!
policy-map type inspect dns preset_dns_map
parameters
message-length maximum client auto
message-length maximum 512
policy-map global_policy
class inspection_default
inspect dns preset_dns_map
inspect ftp
inspect h323 h225
inspect h323 ras
inspect rsh
inspect rtsp
inspect esmtp
inspect sqlnet
inspect skinny
inspect sunrpc
inspect xdmcp
inspect sip
inspect netbios
inspect tftp
inspect ip-options
inspect icmp
inspect ipsec-pass-thru
!
service-policy global_policy global
prompt hostname context
Cryptochecksum:0398876429c949a766f7de4fb3e2037e
: end
If you need any other information or explanation, just ask me.
My firewall model: ASA 5505
Thank you for the help.
Hey Houari,.
I suspect something with the order of your NATing statement which is:
NAT (inside, outside) static static source NETWORK_OBJ_172.19.32.0_19 destination NETWORK_OBJ_192.168.67.0_24 NETWORK_OBJ_192.168.67.0_24 NETWORK_OBJ_172.19.32.0_19
Can you please have this change applied to the ASA:
No source (indoor, outdoor) nat static static NETWORK_OBJ_172.19.32.0_19 destination NETWORK_OBJ_192.168.67.0_24 NETWORK_OBJ_192.168.67.0_24 NETWORK_OBJ_172.19.32.0_19
NAT (inside, outside) 1 static source NETWORK_OBJ_192.168.67.0_24 NETWORK_OBJ_192.168.67.0_24 static destination NETWORK_OBJ_172.19.32.0_19 NETWORK_OBJ_172.19.32.0_19
Try and let me know how it goes.
If she did not help, please put the output form a package tracer will shape your internal network to the remote VPN subnet with the release of «see the nat detail»
HTH,
Mo.
-
Issue of NAT for ASA running 8.4 (5)
We have a client who is about to hang an ASA off the coast of the demilitarized zone of our firewall that is running 8.4 (5). This firewall is currently on another part of our network, and NAT will be considerably changed. Now, everything on the client firewall must be coordinated outside for the same thing as the IP model internal, for example like the old "static (inside, outside) 172.16.16.0 172.16.16.0 netm 255.255.255.0" command.
When I look at the document from Cisco for (conversion) NAT
( http://www.cisco.com/en/US/docs/security/asa/asa83/upgrading/migrating.html#wp96828), I see not all conversions between the two. This is not a "nat 0" because users need access to certain hosts inside the firewall of our customers.
Can someone tell me please in the right direction? Thank you
Hello
Lets assume that the following is true
- The new ASA has 'inside' and 'outside' network/interface only
- The ASA News should do EVERYTHING NAT 'inside' to 'outside' to any kind of situation traffic (your firewall handles this?)
Then you can simply have the ASA with absolutely no. NAT configurations. The ASA with new software releases 8.3 and above all automatically passes all traffic through the ASA UNNATED. We use it on a single client and it works very well.
Please let me know if the above is the case, or can't think of anything else
-Jouni
-
I need VPN gateway to gateway with NAT for several subnets, RV082
I have a pair of RV082 routers and I would like to configure a gateway to gateway VPN tunnel, as described in a book, "How to configure a VPN tunnel that routes all traffic to the remote gateway," (name of file Small_business_router_tunnel_Branch_to_Main.doc). I followed this recipe book and found that my while the main office has internet connectivity, the branch subnet is not an internet connection.
Routing behaves as advertised, where all traffic goes to the seat. However, the 192.168.1.0 subnet in the branch receives no internet connectivity. I read in other posts that the main router will provide only NAT for the local subnet, not the Management Office subnet. Is it possible to configure the RV082 router to provide NAT for all subnets?
If this is not the case, what product Cisco will provide connectivity VPN Tunnel as well as the NAT for all subnets? The RV082 can be used as part of the final solution or are my RV082s a wasted expense?
Here is the configuration that I had put in place, (real IP and IKE keys are false).
Bridge to bridge
Remote Head Office
Add a new Tunnel
No de tunnel 1 2
Name of the tunnel:, n1 n1-2122012_n2-1282012-2122012_n2-1282012
Interface: WAN1 WAN1
Enable : yes yes
--------------------------------------------------------------------------------
Configuration of local groups
Type of local security gateway: IP only IP only
IP address: 10.10.10.123 10.10.10.50
Local security group type: subnet subnet
IP address: 192.168.1.0 0.0.0.0
Subnet mask: 255.255.255.0 0.0.0.0
--------------------------------------------------------------------------------
Configuration of the remote control groups
Remote security gateway type: IP only IP only
IP address: 65.182.226.50 67.22.242.123
Security remote control unit Type: subnet subnet
IP address: 0.0.0.0 192.168.1.0
Subnet mask: 0.0.0.0 255.255.255.0
--------------------------------------------------------------------------------
IPSec configuration
Input mode: IKE with preshared key IKE with preshared key
Group of the phase 1 of DH: Group 5 - 1536 bit group 5 - 1536 bit
Encryption of the phase 1: of THE
The phase 1 authentication: MD5 MD5
Step 1 time in HIS life: 2800 2800 seconds
Perfect Forward Secrecy: Yes Yes
Group of the phase 2 DH: Group 5 - 1536 bit group 5 - 1536 bit
Encryption of the phase 2: of THE
Phase 2 of authentication: MD5 MD5
Time of the phase 2 of HIS life: 3600 seconds 3600 seconds
Preshared key: MyKey MYKey
Minimum complexity of pre-shared key: Enable Yes Enable
--------------------------------------------------------------------------------
If you are running 4.x firmware on your RV082, you must add an additional Allow access rule for the Branch Office subnet (considered one of the multiple subnets in the main office) may have access to the internet. Note the firmware version has more details about it.
http://www.Cisco.com/en/us/docs/routers/CSBR/rv0xx/release/rv0xx_rn_v4-1-1-01.PDF
-
Can the NAT of ASA configuration for vpn local pool
We have a group of tunnel remote ipsec, clients address pool use 172.18.33.0/24 which setup from command "ip local pool. The remote cliens must use full ipsec tunnel.
Because of IP overlap or route number, we would like to NAT this local basin of 172.18.33.0 to 192.168.3.0 subnet when vpn users access certain servers or subnet via external interface of the ASA. I have nat mapping address command from an interface to another interface of Armi. The pool local vpn is not behind any physical interface of the ASA. My question is can ASA policy NAT configuration for vpn local pool. If so, how to set up this NAT.
Thank you
Haiying
Elijah,
NAT_VPNClients ip 172.18.33.0 access list allow 255.255.255.0 10.1.1.0 255.255.255.0
public static 192.168.33.0 (external, outside) - NAT_VPNClients access list
The above configuration will be NAT 172.18.33.0/24 to 192.168.33.0/24 when you go to 10.1.1.0/24 (assuming that 10.1.1.0/24 is your subnet of servers).
To allow the ASA to redirect rewritten traffic the same interface in which he receive, you must also order:
permit same-security-traffic intra-interface
Federico.
-
VPN with static nat for a whole subnet
Hey there,
For some reason, I can't do this on the router. Errrr...
I'm trying to config a static nat (many to one), which will be in effect only when traffic needs to go on our vpn tunnel to the remote location.
example:
internal LAN 192.168.0.0
remote network: 10.10.10.0 and 10.10.15.0
When traffic passes over the tunnel vpn - at the remote site, I need to translate my internal network (192.168.0.0) to an ip address 172.16.32.65 static
any ideas?
also on my crypto map ACL, which must be specified for interesting traffic? my local network or static ip address search?
Let me know your thoughts on the matter.
Kind regards
R.
NAT you describe is named PAT or overload, at least in terms of Ciscos...
What you need:
(1) a NAT - ACL when you describe your traffic which should be natted.
(2) a nat pool with your 172.16.32.65 address
(3) a statement-NAT for dynamic NAT inside based on the ACL for the pool
Here are some examples:
Your crypto ACL then referred to the NATted IP as NAT happens before encryption.
-
I'll put up Anyconnect to replace our customers of Cisco IPsec VPN, since it is end of life. A part of the process is to get an SSL certificate and a FULL domain name to use for this. I've got that and it is applied to the ASA very well. Now we don't get these warnings to the subject it is not not sure and such.
The problem is that we use a non-standard port for the SSL VPN from 443 is already sent to an internal device. I have unused public addresses to the external interface of the ASA, but I don't know how I could use them. I would like to have a different IP address for SSL VPN, so I don't have to mess with the port forward that is currently in place. I read on proxy arp, but that looks like it could be a problem. I could have someone connect another cable to a different interface on the ASA (5512-X) and assign this static interface I want for the VPN, but I'm not sure it will work well. We have connections VPN site to site in place as well. Can I have the ASA listening on two different interfaces at the same time?
Recap:
IP 1 - address primary NAT, Site at tunnels put end here, some Cisco IPsec VPN terminate customer
IP 2 - want to have all customers of Anyconnect connect here, to migrate all legacy Cissco IPsec clients until they are all over Anyconnect.
Key is that I can not stop listening on IP 1 for site-to-site connections.
Thoughts?
Thank you!
On the SAA, you cannot use the additional IPS for VPN.
If tcp/443 is already used for an external server, then I would reconfigure the DNS entry for it to use the second IP address that must be sent to the internal server. You can then use the IP interface of the ASA for AnyConnect.
-
ASA 8.4 (1) source-nat over vpn site-to-site
I'm setting up a tunnel vpn site-to-site and require nat for the local and remote side. The remote side will be nat to
10.2.255.128/25 on their face before they reach our network, so I have to only source-nat our servers via the tunnel to them. Should I just do the static NAT, then let the whole subnet through the acl of valuable traffic as the config below? I don't think I should use twice a nat because I'm not trying to make the destination nat on the firewall. Servers with us will 10.2.255.128/25 and I would like to preserve it through the ASA.
network of the ServerA object
host 10.1.0.1
NAT 10.2.255.1 static (inside, outside)
network of the object server b
host 10.1.0.2
NAT 10.2.255.2 static (inside, outside)
the object server c network
host 10.1.0.3
NAT 10.2.255.3 static (inside, outside)
the LOCAL_SUBNET object-group network
object-network 10.2.255.0 255.255.255.128
the REMOTE_SUBNET object-group network
object-network 10.2.255.128 255.255.255.128
VPN_ACL list extended access permitted ip object-group LOCAL_SUBNET-group of objects REMOTE_SUBNET
Thank you
Your configuration is correct, but I have a few comments. Remember that NAT occurs before the delivery of your servers will be translated into 10.2.255.2 and 10.2.255.3 and then sent through the tunnel, so your encryption field is correct.
Is your internet firewall as well? What your servers out of the internet? They will be translated to 10.2.255.2 and 10.2.255.3 and who will fail in internet routing is. If these servers access the internet through the firewall, I would recommend a configuration like this for each of your servers:
network of the ServerA_NAT object
Home 10.2.255.1
NAT static ServerA ServerA_NAT destination (indoor, outdoor) static source REMOTE_SUBNET REMOTE_SUBNET
This will use destination basic NAT for traffic VPN and NAT everything to a public IP address for the internet traffic. Of course, if this is not your internet connection firewall can do abstraction.
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Traffic permitted only one-way for VPN-connected computers
Hello
I currently have an ASA 5505. I put up as a remote SSL VPN access. My computers can connect to the VPN very well. They just cannot access the internal network (192.168.250.0). They cannot ping the inside interface of the ASA, nor any of the machines. It seems that all traffic is blocked for them. The strange thing is that when someone is connected to the VPN, I can ping this ASA VPN connection machine and other machines inside the LAN. It seems that the traffic allows only one way. I messed up with ACL with nothing doesn't. Any suggestions please?
Pool DHCP-192.168.250.20 - 50--> for LAN
Pool VPN: 192.168.250.100 and 192.168.250.101
Outside interface to get the modem DHCP
The inside interface: 192.168.1.1
Courses Running Config:
: Saved
:
ASA Version 8.2 (5)
!
hostname HardmanASA
activate the password # encrypted
passwd # encrypted
names of
!
interface Ethernet0/0
switchport access vlan 20
!
interface Ethernet0/1
switchport access vlan 10
!
interface Ethernet0/2
switchport access vlan 10
!
interface Ethernet0/3
Shutdown
!
interface Ethernet0/4
Shutdown
!
interface Ethernet0/5
Shutdown
!
interface Ethernet0/6
Shutdown
!
interface Ethernet0/7
switchport access vlan 10
!
interface Vlan1
No nameif
no level of security
no ip address
!
interface Vlan10
nameif inside
security-level 100
IP 192.168.250.1 255.255.255.0
!
interface Vlan20
nameif outside
security-level 0
IP address dhcp setroute
!
passive FTP mode
DNS lookup field inside
DNS domain-lookup outside
pager lines 24
Within 1500 MTU
Outside 1500 MTU
mask 192.168.250.100 - 192.168.250.101 255.255.255.0 IP local pool VPN_Pool
ICMP unreachable rate-limit 1 burst-size 1
don't allow no asdm history
ARP timeout 14400
Global interface 10 (external)
NAT (inside) 10 192.168.250.0 255.255.255.0
Timeout xlate 03:00
Timeout conn 01:00 half-closed 0:10:00 udp 0:02:00 icmp 0:00:02
Sunrpc timeout 0:10:00 h323 0:05:00 h225 mgcp from 01:00 0:05:00 mgcp-pat 0:05:00
Sip timeout 0:30:00 sip_media 0:02:00 prompt Protocol sip-0: 03:00 sip - disconnect 0:02:00
Timeout sip-provisional-media 0:02:00 uauth 0:05:00 absolute
timeout tcp-proxy-reassembly 0:01:00
Floating conn timeout 0:00:00
dynamic-access-policy-registration DfltAccessPolicy
the ssh LOCAL console AAA authentication
Enable http server
http 192.168.250.0 255.255.255.0 inside
No snmp server location
No snmp Server contact
Server enable SNMP traps snmp authentication linkup, linkdown cold start
life crypto ipsec security association seconds 28800
Crypto ipsec kilobytes of life - safety 4608000 association
Telnet timeout 5
SSH 192.168.250.0 255.255.255.0 inside
SSH timeout 5
SSH version 2
Console timeout 0
dhcpd dns 8.8.8.8
!
dhcpd address 192.168.250.20 - 192.168.250.50 inside
dhcpd allow inside
!
a basic threat threat detection
Statistics-list of access threat detection
no statistical threat detection tcp-interception
WebVPN
allow outside
SVC disk0:/anyconnect-win-2.5.2014-k9.pkg 1 image
SVC disk0:/anyconnect-macosx-i386-2.5.2014-k9.pkg 2 image
Picture disk0:/anyconnect-linux-2.5.2014-k9.pkg 3 SVC
enable SVC
tunnel-group-list activate
attributes of Group Policy DfltGrpPolicy
value of server DNS 8.8.8.8
Protocol-tunnel-VPN IPSec l2tp ipsec svc webvpn
tunnel-group AnyConnect type remote access
tunnel-group AnyConnect General attributes
address pool VPN_Pool
tunnel-group AnyConnect webvpn-attributes
enable AnyConnect group-alias
!
class-map inspection_default
match default-inspection-traffic
!
!
type of policy-card inspect dns preset_dns_map
parameters
maximum message length automatic of customer
message-length maximum 512
Policy-map global_policy
class inspection_default
inspect the preset_dns_map dns
inspect the ftp
inspect h323 h225
inspect the h323 ras
Review the ip options
inspect the netbios
inspect the rsh
inspect the rtsp
inspect the skinny
inspect esmtp
inspect sqlnet
inspect sunrpc
inspect the tftp
inspect the sip
inspect xdmcp
!
global service-policy global_policy
context of prompt hostname
no remote anonymous reporting call
call-home
Profile of CiscoTAC-1
no active account
http https://tools.cisco.com/its/service/oddce/services/DDCEService destination address
email address of destination [email protected] / * /
destination-mode http transport
Subscribe to alert-group diagnosis
Subscribe to alert-group environment
Subscribe to alert-group monthly periodic inventory
monthly periodicals to subscribe to alert-group configuration
daily periodic subscribe to alert-group telemetry
Cryptochecksum:30fadff4b400e42e73e17167828e046f
: end
Hello
No worries
As we change the config I would do as well as possible.
First, it is strongly recommended to use a different range of IP addresses for VPN clients and the internal network
No VPN_Pool 192.168.250.100 - 192.168.250.101 255.255.255.0 ip local pool mask
mask 192.168.251.100 - 192.168.251.101 255.255.255.0 IP local pool VPN_Pool
NAT_0 ip 192.168.250.0 access list allow 255.255.255.0 192.168.251.0 255.255.255.0
NAT (inside) 0-list of access NAT_0
Then give it a try and it work note this post hehe
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